+int stmpe811_adc_common_init(struct stmpe *stmpe)
+{
+ int ret;
+ u8 adc_ctrl1, adc_ctrl1_mask;
+
+ adc_ctrl1 = STMPE_SAMPLE_TIME(stmpe->sample_time) |
+ STMPE_MOD_12B(stmpe->mod_12b) |
+ STMPE_REF_SEL(stmpe->ref_sel);
+ adc_ctrl1_mask = STMPE_SAMPLE_TIME(0xff) | STMPE_MOD_12B(0xff) |
+ STMPE_REF_SEL(0xff);
+
+ ret = stmpe_set_bits(stmpe, STMPE811_REG_ADC_CTRL1,
+ adc_ctrl1_mask, adc_ctrl1);
+ if (ret) {
+ dev_err(stmpe->dev, "Could not setup ADC\n");
+ return ret;
+ }
+
+ ret = stmpe_set_bits(stmpe, STMPE811_REG_ADC_CTRL2,
+ STMPE_ADC_FREQ(0xff), STMPE_ADC_FREQ(stmpe->adc_freq));
+ if (ret) {
+ dev_err(stmpe->dev, "Could not setup ADC\n");
+ return ret;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(stmpe811_adc_common_init);
+